add release script (#61)

justfile

@@ -0,0 +1,25 @@
+release version:
+    # Ensuring we are on main branch
+    @git rev-parse --verify main > /dev/null 2>&1 || (echo "Not on main branch" && exit 1)
+
+    # Ensuring working directory is clean
+    @git status --porcelain | grep -q . && (echo "Working directory is not clean (has changes or untracked files)" && exit 1)
+
+    # Creating and checking out release preparation branch
+    @git checkout -b release-prep-{{version}}
+
+    # Updating version in manifest.json
+    @sed -i '' 's/"version": "[^"]*"/"version": "{{version}}"/' custom_components/daikinone/manifest.json
+
+    # Comitting version bump
+    @git commit -am "release: prepare release {{version}}"
+
+    # Pushing branch and creating PR
+    @git push -u origin release-prep-{{version}}
+    @gh pr create --title "release: prepare {{version}}" --body "Prepare release {{version}}" --base main
+
+    # Merging PR
+    @gh pr merge --auto --delete-branch
+
+    # Creating release
+    @gh release create v{{version}} --generate-notes